MPD: thread/WindowsCond.hxx Source File

MPD 0.20.15

WindowsCond.hxx
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1 /*
2 * Copyright (C) 2009-2013 Max Kellermann <max.kellermann@gmail.com>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the
14 * distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #ifndef THREAD_WINDOWS_COND_HXX
31 #define THREAD_WINDOWS_COND_HXX
32
33 #include "CriticalSection.hxx"
34
35 #include <chrono>
36
40 class WindowsCond {
41 CONDITION_VARIABLE cond;
42
43 public:
44 WindowsCond() {
45 InitializeConditionVariable(&cond);
46 }
47
48 WindowsCond(const WindowsCond &other) = delete;
49 WindowsCond &operator=(const WindowsCond &other) = delete;
50
51 void signal() {
52 WakeConditionVariable(&cond);
53 }
54
55 void broadcast() {
56 WakeAllConditionVariable(&cond);
57 }
58
59 private:
60 bool timed_wait(CriticalSection &mutex, DWORD timeout_ms) {
61 return SleepConditionVariableCS(&cond, &mutex.critical_section,
62 timeout_ms);
63 }
64
65 public:
66 bool timed_wait(CriticalSection &mutex,
67 std::chrono::steady_clock::duration timeout) {
68 auto timeout_ms = std::chrono::duration_cast<std::chrono::milliseconds>(timeout).count();
69 return timed_wait(mutex, timeout_ms);
70 }
71
72 void wait(CriticalSection &mutex) {
73 timed_wait(mutex, INFINITE);
74 }
75 };
76
77 #endif
WindowsCond
Wrapper for a CONDITION_VARIABLE, backend for the Cond class.
Definition: WindowsCond.hxx:40
CriticalSection
Wrapper for a CRITICAL_SECTION, backend for the Mutex class.
Definition: CriticalSection.hxx:38
WindowsCond::broadcast
void broadcast()
Definition: WindowsCond.hxx:55
WindowsCond::signal
void signal()
Definition: WindowsCond.hxx:51
WindowsCond::WindowsCond
WindowsCond()
Definition: WindowsCond.hxx:44
WindowsCond::timed_wait
bool timed_wait(CriticalSection &mutex, std::chrono::steady_clock::duration timeout)
Definition: WindowsCond.hxx:66
WindowsCond::wait
void wait(CriticalSection &mutex)
Definition: WindowsCond.hxx:72
CriticalSection.hxx
WindowsCond::operator=
WindowsCond & operator=(const WindowsCond &other)=delete